1st off, be damn sure you have a nv4500. Would have expected a nv2500. Should be cast iron case. 2500 is not very strong and a grenade behind a 5.9 magnum with spirited driving
next, the engine swap is about as simple as it gets. Will need the 5.2 or 5.9 computer depending on what engine you decide on and need to splice in the wiring pigtails for the 7 and 8 injectors into your V6 harness. Strongly recommend the 93 factory service manual for that.
Then engine brackets. I always get this confused but I think you can remove the v6 brackets, but make sure you get the proper 5.2 or 5.9 motor mount brackets for the v8
Flywheel is still specific to the 5.2 or 5.9 those years, not both. Recommend buying one, but they are cheap
Hopefully scratchy will get in on this